Let \(\left[ ,\right] \)  be the scalar product in \(L_{2}(-d,d)\) . Denote \(b_{s,k}=\left[ Q_{s}^{\prime },Q_{k}\right] .\)  Then [1]}, [2]}
\(b_{s,k}=\left\lbrace \begin{array}{c}1,s=k, \\0,s>k.\end{array}\right. \) 
